Proficiency Test on Hydraulic Fluid (Fresh) finished

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Download the report (iis14L20) of this Proficiency Test on Hydraulic Fluid (Fresh)

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Summary of this proficiency test:

On 3 February 2015, the proficiency test on Hydraulic Fluid (Fresh) iis14L20 was finished. It started on 29 October 2014 (see message Proficiency Test on Hydraulic Fluid (Fresh), started on this website) when the samples were distributed.

In this international interlaboratory study 30 participants in 20 different countries have participated.

The samples were tested on :Total Acid Number, Density @ 15°C, Flash Point PMcc,  Kinematic viscosity @ 40°C, Kinematic viscosity @ 100°C, Copper Corrosion, Foaming Characteristics, Viscosity Index, Viscosity Stabinger at 40°C and at 100°C, Pour Point Manual/ Automated, Sulphur, Water Separability, Water, Ca, P and Zn.

The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated for each participant are tabulated. Also, for each test, the calculated summary (e.g. mean, standard deviation and reproducibility) is given.

In the report also an evaluation of the test results is given. Problems encountered in the analyses are mentioned and - where possible - suggestions for quality improvement are formulated. For each test a comparison is made between the results of the group of participants and the requirements given by the relevant standard (e.g. ISO, DIN, ASTM).